How many calories are provided by a food that contains 20 grams of carbohydrate, 8 grams protein, and 5 grams of fat?

a. 232

b. 378

c. 157

d. 258

e. 558?

Every gram of carbohydrate yields 4 Calories.

Every gram of protein also yields 4 Calories.

Every gram of fat yields 9 Calories.

20 g carb x 4 = 80 Cal

8 g protein x 4 = 32 Cal

5 g fat x 9 = 45 Cal.

80+32+45 = 157 Calories. Answer C